B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Dated
8.4%
8.4% -- conversion rate lift per 0 1s speed improvement for retail ecommerce sites (2020)
A 0.1-second improvement in page load time produced an 8.4% increase in conversions.
- Study conducted by Deloitte measuring consumer behavior
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
8.4%
Unit
Percentage
Data Vintage
2020
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Deloitte
Primary
Tier B
https://pagepilot.ai/blog/shopify-speed-optimization ↗
Source Article
14 Proven Strategies For Shopify Speed Optimization
Slow stores lose sales; have you noticed visitors abandoning carts when product pages and checkout take too long to load? Choosing one of the Best Shopify page builders is crucial because page speed impacts SEO, conversion rates, and core web vitals, such as LCP and CLS. This article shows proven st…
Original Research
Deloitte
· Original study ↗
Methodology
Deloitte consumer behavior research on page load speed (0.1-second improvement producing 8.4% rise in conversions), matching Deloitte's 'Milliseconds Make Millions' study; cited without date in article.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
retail ecommerce sites: 8.4% conversion rate lift per 0 1s speed improvement. Source: Deloitte (2020). Via Lighthouse Intelligence -- https://lighthousedata.io/data/conversion-lift-0-1s-load-time-deloitte
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<blockquote cite="https://lighthousedata.io/data/conversion-lift-0-1s-load-time-deloitte" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>8.4%</strong> -- conversion rate lift per 0 1s speed improvement for retail ecommerce sites<br><small>Source: Deloitte (2020) · <a href="https://lighthousedata.io/data/conversion-lift-0-1s-load-time-deloitte" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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